Reenforced-concrete construction



P. L G. JOHNSTON.

REENFGRCED CONCRETE CONSTRUCTION.

APPLICATION man DEc,1o,1919.

1,410,923, Patented Ma1-. 28, 1922.

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i n ST A E 55% PER/CY LIONEL GILBERT JOHNSTON, OF MOTTINGAM, ENG-LAND.

REENFORCED-CONCRETE CONSTRUCTION.

ySpecicaton of Letters Patent.

Patented Mar. 28, 1922.

Application led December 10, 1919. Serial No. 343,872.

1/ 'o all to /iom t may concern.'

Be it known that I, Pliner LIONEL GIL- nniir JOHNSTON, a subject of the Iing of Great Britain and Ireland, residin at Mottingham, in the county oi Kent, iiiigland,`

have invented certain new and useful Improveniente' in Beenforced-Concrete (Jon`- struction, of which the following is a specification.

This invention relates to reeni'orced conconcrete with or without rods passed trans-r versely through the corrugatioiis of one or more sets or series of sheets.

According to this invention the slabs are formed oit two or more sheets of corrugated metal superposed valley to valley so as to forni hollow spaces between apices and bolted together' with sheets or strips of wii'e netting secured thereto on one or both external sides and concrete laid on one or both external sides so as to embed the wire netting and be securely held by the netting to the sheet, the arrangement being such as to createslabs with a series of cavities therein which is adapted to resist the transmission of sound. Rods may be passed transversely through the corrugations oic one or more sets or series of sheets.

The concrete may be stone or coke breeze concrete, the work may be inished off with neat cement, rough cast plaster or Votherwise.

Referring to the `drawings filed herewith Y y F ig. l is a section of a slab forined with two corrugated sheets;

Fig. 2 is a section of a slab formed with three corrugated sheets; i

Fig. 3 is a section showing the application ot the invention to a staircase;

Fig. 4; is a horizontal section of a column;

Fig. 5 is a section of a beam.

ci a are corrugated metal sheets. sheets or strips of wire netting stretched over the corrugations. These may be secured to the sheets by clips or studs c passing through the sheets.

Ordinary concrete d is placed or cast on the sheet a so as to embed the wire netting,

`'and rough cast or plaster e is the external finish.

Concrete formed of coke breeze and ceinent f is placed on the other side of the corrugated plate and the surface, is covered with lplaster g. Rods o pass through the `corrugations to prevent horizontal shear.

The corrugated sheets are bolted together i at p and where used as a floor may be covcred with suitable flooring material iz.. Cavities formed between the corrugated sheets are shown at 7'. The slab shown in Fig. l is shown to a smaller scale at the foot and top ot the staircase shown in Fig. The

vconstruction shown in Fig. 3 is preferably formed or cast in one piece. The bottom corrugated sheets from the top and bottom slabs being carried through to formthe soliit of the staircase.

In Fig. l and Fig.`5 the parts are formed orcast in one piece to form cavities i' and parts of buildings.

V canv be used as columns, beams and other Vhere more than two corrugated metal sheets are employed the concrete may be disposed in one or more of the series of internal cavities as shown at 'd' inf, Fig. 2. f

What I claim and desire to secure by Letters Patent is :--l

A building structure, comprising, in combination, a plurality of corrugated metal sheets superposed and bolted together, rods passing transversely through the corrugations of said sheets thereby to prevent horizontal shear, wire netting secured on the external side of at least one of the sheets, and

concrete laid on the external surface of atV least one corrugated sheet thereby to embed the wire netting, the construction being such as to form a slab having a series of cavities between the metal sheets. y In testimony whereof I have signed my name to this specification.

PERCY LIONEL GILBERT JOHNSTON. 

